.box {
  position: fixed;
  top: 45px;
  height: 45px;
  width: 100vw;
  background-color: #f8f8f8;
  border-bottom: 1px solid #efefef;
  z-index: 1;

  display: flex;
  justify-content: space-between;
  align-items: center;
}
